Of course, remember the formula first and then remember it. Remember clearly some main formulas and deformations of mechanics and electricity.

For example, I=U/R ohm's law formula, its deformation U=IR is very useful. When the voltage ratio and resistance are the same, the voltage ratio is the current ratio. There are also mechanical F-float =pgv rows and so on. Remember the formula and deformation clearly.

Draw a force analysis diagram for mechanical problems, and pass the diagram equation. Draw the equivalent circuit diagram of electrical problems and make the same equation according to the formula. This is a computational class.

There is also a chapter on magnetic phenomena, with many concepts, such as magnetic field, magnetic pole and so on. The magnetic effect of current, the powerful effect of magnetic field on current, electromagnetic induction and their applications are all recorded in the book.

Wish the landlord success.